./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/alternating_list-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/alternating_list-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da856cb29218eae000c82400da3ef1c667e9f55c .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:24:55,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:24:55,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:24:55,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:24:55,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:24:55,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:24:55,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:24:55,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:24:55,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:24:55,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:24:55,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:24:55,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:24:55,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:24:55,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:24:55,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:24:55,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:24:55,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:24:55,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:24:55,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:24:55,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:24:55,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:24:55,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:24:55,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:24:55,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:24:55,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:24:55,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:24:55,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:24:55,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:24:55,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:24:55,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:24:55,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:24:55,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:24:55,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:24:55,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:24:55,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:24:55,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:24:55,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:24:55,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:24:55,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:24:55,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:24:55,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:24:55,260 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2020-11-30 02:24:55,291 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:24:55,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:24:55,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:24:55,293 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:24:55,293 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:24:55,294 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:24:55,294 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:24:55,294 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:24:55,295 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:24:55,295 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:24:55,295 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:24:55,295 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:24:55,296 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:24:55,296 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:24:55,296 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:24:55,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 02:24:55,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 02:24:55,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:24:55,298 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:24:55,299 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:24:55,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:24:55,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:24:55,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:24:55,300 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 02:24:55,300 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 02:24:55,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:24:55,301 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:24:55,301 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:24:55,301 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:24:55,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:24:55,302 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:24:55,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:24:55,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:24:55,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:24:55,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:24:55,303 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:24:55,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:24:55,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:24:55,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:24:55,305 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da856cb29218eae000c82400da3ef1c667e9f55c [2020-11-30 02:24:55,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:24:55,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:24:55,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:24:55,686 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:24:55,687 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:24:55,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/../../sv-benchmarks/c/list-properties/alternating_list-2.i [2020-11-30 02:24:55,805 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/data/c901beb72/a8aaae3b6f4a4d67a7b5bb621ea1299d/FLAGf9c450346 [2020-11-30 02:24:56,609 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:24:56,610 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/sv-benchmarks/c/list-properties/alternating_list-2.i [2020-11-30 02:24:56,626 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/data/c901beb72/a8aaae3b6f4a4d67a7b5bb621ea1299d/FLAGf9c450346 [2020-11-30 02:24:56,868 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/data/c901beb72/a8aaae3b6f4a4d67a7b5bb621ea1299d [2020-11-30 02:24:56,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:24:56,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:24:56,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:24:56,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:24:56,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:24:56,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:24:56" (1/1) ... [2020-11-30 02:24:56,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b3db0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:56, skipping insertion in model container [2020-11-30 02:24:56,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:24:56" (1/1) ... [2020-11-30 02:24:56,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:24:56,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:24:57,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:24:57,403 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:24:57,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:24:57,563 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:24:57,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:57 WrapperNode [2020-11-30 02:24:57,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:24:57,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:24:57,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:24:57,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:24:57,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:57" (1/1) ... [2020-11-30 02:24:57,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:57" (1/1) ... [2020-11-30 02:24:57,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:24:57,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:24:57,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:24:57,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:24:57,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:57" (1/1) ... [2020-11-30 02:24:57,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:57" (1/1) ... [2020-11-30 02:24:57,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:57" (1/1) ... [2020-11-30 02:24:57,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:57" (1/1) ... [2020-11-30 02:24:57,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:57" (1/1) ... [2020-11-30 02:24:57,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:57" (1/1) ... [2020-11-30 02:24:57,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:57" (1/1) ... [2020-11-30 02:24:57,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:24:57,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:24:57,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:24:57,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:24:57,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:24:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 02:24:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 02:24:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-30 02:24:57,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-30 02:24:57,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:24:57,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-30 02:24:57,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:24:57,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 02:24:57,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:24:57,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:24:58,561 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:24:58,561 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-30 02:24:58,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:24:58 BoogieIcfgContainer [2020-11-30 02:24:58,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:24:58,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:24:58,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:24:58,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:24:58,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:24:56" (1/3) ... [2020-11-30 02:24:58,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce6b74d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:24:58, skipping insertion in model container [2020-11-30 02:24:58,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:57" (2/3) ... [2020-11-30 02:24:58,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce6b74d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:24:58, skipping insertion in model container [2020-11-30 02:24:58,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:24:58" (3/3) ... [2020-11-30 02:24:58,575 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-11-30 02:24:58,589 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:24:58,594 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 30 error locations. [2020-11-30 02:24:58,608 INFO L253 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2020-11-30 02:24:58,631 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:24:58,632 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 02:24:58,632 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:24:58,632 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:24:58,632 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:24:58,632 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:24:58,633 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:24:58,633 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:24:58,651 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-11-30 02:24:58,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:24:58,675 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:58,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:24:58,676 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:24:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:58,684 INFO L82 PathProgramCache]: Analyzing trace with hash 5482218, now seen corresponding path program 1 times [2020-11-30 02:24:58,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:58,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730296982] [2020-11-30 02:24:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:58,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730296982] [2020-11-30 02:24:58,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:24:58,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:24:58,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999287915] [2020-11-30 02:24:58,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 02:24:58,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:58,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 02:24:58,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:24:58,900 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 2 states. [2020-11-30 02:24:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:58,920 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-11-30 02:24:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:24:58,922 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-11-30 02:24:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:58,933 INFO L225 Difference]: With dead ends: 67 [2020-11-30 02:24:58,934 INFO L226 Difference]: Without dead ends: 64 [2020-11-30 02:24:58,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:24:58,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-30 02:24:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-11-30 02:24:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-30 02:24:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-11-30 02:24:58,982 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 4 [2020-11-30 02:24:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:58,982 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-11-30 02:24:58,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 02:24:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-11-30 02:24:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:24:58,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:58,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:24:58,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:24:58,985 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:24:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:58,986 INFO L82 PathProgramCache]: Analyzing trace with hash 169913100, now seen corresponding path program 1 times [2020-11-30 02:24:58,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:58,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169207945] [2020-11-30 02:24:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:59,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169207945] [2020-11-30 02:24:59,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:24:59,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:24:59,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845246808] [2020-11-30 02:24:59,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:24:59,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:59,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:24:59,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:24:59,151 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 4 states. [2020-11-30 02:24:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:59,452 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-11-30 02:24:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:24:59,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-30 02:24:59,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:59,457 INFO L225 Difference]: With dead ends: 84 [2020-11-30 02:24:59,457 INFO L226 Difference]: Without dead ends: 84 [2020-11-30 02:24:59,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:24:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-30 02:24:59,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2020-11-30 02:24:59,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-30 02:24:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-11-30 02:24:59,481 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 5 [2020-11-30 02:24:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:59,482 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-11-30 02:24:59,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:24:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-11-30 02:24:59,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:24:59,483 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:59,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:24:59,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:24:59,484 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:24:59,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:59,485 INFO L82 PathProgramCache]: Analyzing trace with hash 169913101, now seen corresponding path program 1 times [2020-11-30 02:24:59,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:59,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492118478] [2020-11-30 02:24:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:59,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492118478] [2020-11-30 02:24:59,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:24:59,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:24:59,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015999784] [2020-11-30 02:24:59,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:24:59,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:59,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:24:59,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:24:59,647 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 4 states. [2020-11-30 02:24:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:59,890 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2020-11-30 02:24:59,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:24:59,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-30 02:24:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:59,892 INFO L225 Difference]: With dead ends: 89 [2020-11-30 02:24:59,892 INFO L226 Difference]: Without dead ends: 89 [2020-11-30 02:24:59,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:24:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-30 02:24:59,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-11-30 02:24:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-30 02:24:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-11-30 02:24:59,904 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 5 [2020-11-30 02:24:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:59,904 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-11-30 02:24:59,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:24:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-11-30 02:24:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 02:24:59,906 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:59,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:59,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 02:24:59,907 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:24:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:59,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1856744181, now seen corresponding path program 1 times [2020-11-30 02:24:59,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:59,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639215639] [2020-11-30 02:24:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:00,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639215639] [2020-11-30 02:25:00,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:00,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:25:00,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440210067] [2020-11-30 02:25:00,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:25:00,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:00,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:25:00,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:25:00,009 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 4 states. [2020-11-30 02:25:00,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:00,156 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-11-30 02:25:00,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:25:00,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-30 02:25:00,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:00,158 INFO L225 Difference]: With dead ends: 85 [2020-11-30 02:25:00,158 INFO L226 Difference]: Without dead ends: 85 [2020-11-30 02:25:00,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:25:00,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-30 02:25:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2020-11-30 02:25:00,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-30 02:25:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-11-30 02:25:00,172 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 12 [2020-11-30 02:25:00,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:00,173 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-11-30 02:25:00,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:25:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-11-30 02:25:00,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 02:25:00,175 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:00,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:00,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 02:25:00,178 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:25:00,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:00,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1856746898, now seen corresponding path program 1 times [2020-11-30 02:25:00,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:00,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56905522] [2020-11-30 02:25:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:00,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56905522] [2020-11-30 02:25:00,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:00,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:25:00,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360370960] [2020-11-30 02:25:00,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:25:00,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:25:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:25:00,312 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 5 states. [2020-11-30 02:25:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:00,454 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2020-11-30 02:25:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:25:00,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-30 02:25:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:00,456 INFO L225 Difference]: With dead ends: 89 [2020-11-30 02:25:00,456 INFO L226 Difference]: Without dead ends: 89 [2020-11-30 02:25:00,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:25:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-30 02:25:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-11-30 02:25:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-30 02:25:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-11-30 02:25:00,467 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 12 [2020-11-30 02:25:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:00,467 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-11-30 02:25:00,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:25:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-11-30 02:25:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 02:25:00,469 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:00,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:00,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 02:25:00,476 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:25:00,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:00,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1897659436, now seen corresponding path program 1 times [2020-11-30 02:25:00,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:00,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786610000] [2020-11-30 02:25:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:00,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786610000] [2020-11-30 02:25:00,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:00,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:25:00,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031286598] [2020-11-30 02:25:00,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:25:00,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:00,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:25:00,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:25:00,578 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 3 states. [2020-11-30 02:25:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:00,604 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2020-11-30 02:25:00,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:25:00,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-30 02:25:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:00,606 INFO L225 Difference]: With dead ends: 130 [2020-11-30 02:25:00,606 INFO L226 Difference]: Without dead ends: 130 [2020-11-30 02:25:00,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:25:00,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-30 02:25:00,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 89. [2020-11-30 02:25:00,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-30 02:25:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-11-30 02:25:00,617 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 12 [2020-11-30 02:25:00,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:00,617 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-11-30 02:25:00,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:25:00,618 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-11-30 02:25:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 02:25:00,623 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:00,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:00,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 02:25:00,625 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:25:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1888116706, now seen corresponding path program 1 times [2020-11-30 02:25:00,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:00,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430570727] [2020-11-30 02:25:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:00,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430570727] [2020-11-30 02:25:00,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:00,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 02:25:00,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932733732] [2020-11-30 02:25:00,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:25:00,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:00,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:25:00,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:25:00,720 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 5 states. [2020-11-30 02:25:00,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:00,933 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-11-30 02:25:00,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:25:00,934 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-30 02:25:00,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:00,935 INFO L225 Difference]: With dead ends: 108 [2020-11-30 02:25:00,935 INFO L226 Difference]: Without dead ends: 108 [2020-11-30 02:25:00,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:25:00,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-30 02:25:00,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2020-11-30 02:25:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-30 02:25:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-11-30 02:25:00,945 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 12 [2020-11-30 02:25:00,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:00,945 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-11-30 02:25:00,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:25:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-11-30 02:25:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:25:00,947 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:00,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:00,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-30 02:25:00,948 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:25:00,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:00,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1724579138, now seen corresponding path program 1 times [2020-11-30 02:25:00,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:00,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903834628] [2020-11-30 02:25:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:01,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903834628] [2020-11-30 02:25:01,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:01,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:25:01,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238705668] [2020-11-30 02:25:01,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:25:01,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:01,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:25:01,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:25:01,016 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 5 states. [2020-11-30 02:25:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:01,178 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-11-30 02:25:01,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:25:01,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-30 02:25:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:01,180 INFO L225 Difference]: With dead ends: 100 [2020-11-30 02:25:01,180 INFO L226 Difference]: Without dead ends: 100 [2020-11-30 02:25:01,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:25:01,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-30 02:25:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2020-11-30 02:25:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-30 02:25:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-11-30 02:25:01,188 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 13 [2020-11-30 02:25:01,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:01,188 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-11-30 02:25:01,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:25:01,189 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-11-30 02:25:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:25:01,189 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:01,190 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:01,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-30 02:25:01,190 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:25:01,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:01,191 INFO L82 PathProgramCache]: Analyzing trace with hash -248756619, now seen corresponding path program 1 times [2020-11-30 02:25:01,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:01,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572602032] [2020-11-30 02:25:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:01,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572602032] [2020-11-30 02:25:01,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:01,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 02:25:01,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085879365] [2020-11-30 02:25:01,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:25:01,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:01,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:25:01,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:25:01,281 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 5 states. [2020-11-30 02:25:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:01,493 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2020-11-30 02:25:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:25:01,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-30 02:25:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:01,495 INFO L225 Difference]: With dead ends: 100 [2020-11-30 02:25:01,495 INFO L226 Difference]: Without dead ends: 100 [2020-11-30 02:25:01,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:25:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-30 02:25:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2020-11-30 02:25:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-30 02:25:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-11-30 02:25:01,502 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 13 [2020-11-30 02:25:01,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:01,502 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-11-30 02:25:01,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:25:01,503 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-11-30 02:25:01,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:25:01,504 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:01,504 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:01,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-30 02:25:01,505 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:25:01,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:01,505 INFO L82 PathProgramCache]: Analyzing trace with hash -248756618, now seen corresponding path program 1 times [2020-11-30 02:25:01,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:01,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75493444] [2020-11-30 02:25:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:01,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75493444] [2020-11-30 02:25:01,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:01,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 02:25:01,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686160743] [2020-11-30 02:25:01,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:25:01,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:01,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:25:01,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:25:01,635 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 5 states. [2020-11-30 02:25:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:01,940 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2020-11-30 02:25:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:25:01,941 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-30 02:25:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:01,942 INFO L225 Difference]: With dead ends: 111 [2020-11-30 02:25:01,942 INFO L226 Difference]: Without dead ends: 111 [2020-11-30 02:25:01,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:25:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-30 02:25:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2020-11-30 02:25:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-30 02:25:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-11-30 02:25:01,948 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 13 [2020-11-30 02:25:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:01,948 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-11-30 02:25:01,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:25:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-11-30 02:25:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:25:01,950 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:01,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:01,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-30 02:25:01,950 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:25:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:01,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1919735203, now seen corresponding path program 1 times [2020-11-30 02:25:01,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:01,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365597040] [2020-11-30 02:25:01,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:02,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365597040] [2020-11-30 02:25:02,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:02,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:25:02,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754788787] [2020-11-30 02:25:02,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:25:02,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:02,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:25:02,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:25:02,162 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 5 states. [2020-11-30 02:25:02,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:02,338 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2020-11-30 02:25:02,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:25:02,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-30 02:25:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:02,339 INFO L225 Difference]: With dead ends: 93 [2020-11-30 02:25:02,340 INFO L226 Difference]: Without dead ends: 89 [2020-11-30 02:25:02,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:25:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-30 02:25:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-11-30 02:25:02,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-30 02:25:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-11-30 02:25:02,344 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 14 [2020-11-30 02:25:02,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:02,344 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-11-30 02:25:02,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:25:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-11-30 02:25:02,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:25:02,345 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:02,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:02,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-30 02:25:02,346 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:25:02,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:02,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1922345876, now seen corresponding path program 1 times [2020-11-30 02:25:02,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:02,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140341820] [2020-11-30 02:25:02,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:02,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140341820] [2020-11-30 02:25:02,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:02,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:25:02,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971796452] [2020-11-30 02:25:02,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:25:02,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:02,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:25:02,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:25:02,404 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 4 states. [2020-11-30 02:25:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:02,506 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-11-30 02:25:02,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:25:02,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-30 02:25:02,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:02,516 INFO L225 Difference]: With dead ends: 80 [2020-11-30 02:25:02,516 INFO L226 Difference]: Without dead ends: 80 [2020-11-30 02:25:02,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:25:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-30 02:25:02,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-11-30 02:25:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-30 02:25:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2020-11-30 02:25:02,521 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 14 [2020-11-30 02:25:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:02,522 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2020-11-30 02:25:02,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:25:02,522 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2020-11-30 02:25:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:25:02,523 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:02,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:02,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-30 02:25:02,523 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:25:02,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:02,524 INFO L82 PathProgramCache]: Analyzing trace with hash -536819853, now seen corresponding path program 1 times [2020-11-30 02:25:02,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:02,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960922669] [2020-11-30 02:25:02,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:02,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960922669] [2020-11-30 02:25:02,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:02,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-30 02:25:02,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342674768] [2020-11-30 02:25:02,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:25:02,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:02,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:25:02,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:25:02,656 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand 6 states. [2020-11-30 02:25:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:02,872 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2020-11-30 02:25:02,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:25:02,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-30 02:25:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:02,874 INFO L225 Difference]: With dead ends: 94 [2020-11-30 02:25:02,874 INFO L226 Difference]: Without dead ends: 88 [2020-11-30 02:25:02,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:25:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-30 02:25:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2020-11-30 02:25:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-30 02:25:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-11-30 02:25:02,878 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 15 [2020-11-30 02:25:02,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:02,878 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-11-30 02:25:02,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:25:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-11-30 02:25:02,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 02:25:02,879 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:02,879 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:02,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-30 02:25:02,880 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:25:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:02,880 INFO L82 PathProgramCache]: Analyzing trace with hash -2002400167, now seen corresponding path program 1 times [2020-11-30 02:25:02,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:02,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242400266] [2020-11-30 02:25:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:03,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242400266] [2020-11-30 02:25:03,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260202760] [2020-11-30 02:25:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:03,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 02:25:03,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:25:03,565 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:25:03,565 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-11-30 02:25:03,567 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:25:03,619 INFO L625 ElimStorePlain]: treesize reduction 14, result has 65.9 percent of original size [2020-11-30 02:25:03,620 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:25:03,620 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:27 [2020-11-30 02:25:03,771 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-11-30 02:25:03,771 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:25:03,798 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:25:03,800 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:25:03,800 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2020-11-30 02:25:04,043 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:25:04,043 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 67 [2020-11-30 02:25:04,047 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2020-11-30 02:25:04,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-30 02:25:04,049 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:25:04,121 INFO L625 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2020-11-30 02:25:04,124 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:25:04,124 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:36 [2020-11-30 02:25:04,261 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-30 02:25:04,263 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-11-30 02:25:04,263 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:25:04,277 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:25:04,282 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:25:04,283 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:15 [2020-11-30 02:25:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:04,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:25:04,406 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:25:04,418 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:25:04,419 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 02:25:04,420 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:26 [2020-11-30 02:25:04,691 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 90 [2020-11-30 02:25:04,695 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:25:04,850 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-11-30 02:25:04,852 INFO L625 ElimStorePlain]: treesize reduction 36, result has 62.5 percent of original size [2020-11-30 02:25:04,854 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-11-30 02:25:04,855 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-11-30 02:25:04,860 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:25:04,867 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 3, 2, 1] term [2020-11-30 02:25:04,867 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:25:04,871 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-11-30 02:25:04,871 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:124 [2020-11-30 02:25:05,091 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-11-30 02:25:07,176 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 30 [2020-11-30 02:25:07,178 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-11-30 02:25:07,234 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:25:07,235 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2020-11-30 02:25:07,236 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 02:25:07,242 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:25:07,244 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:25:07,247 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:25:07,279 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:25:07,279 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2020-11-30 02:25:07,281 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 02:25:07,282 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 02:25:07,283 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:25:07,288 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 1] term [2020-11-30 02:25:07,288 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:25:07,290 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:25:07,312 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:25:07,312 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2020-11-30 02:25:07,313 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 02:25:07,314 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:25:07,326 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:25:07,332 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-30 02:25:07,427 INFO L625 ElimStorePlain]: treesize reduction 26, result has 65.3 percent of original size [2020-11-30 02:25:07,441 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-11-30 02:25:07,441 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:82, output treesize:17 [2020-11-30 02:25:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:07,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376946293] [2020-11-30 02:25:07,583 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-11-30 02:25:07,583 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:25:07,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:25:07,598 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:25:07,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:25:07,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:25:08,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:25:08,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:25:08,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:25:08,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:25:08,890 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:25:09,162 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:25:09,564 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-11-30 02:25:10,020 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-11-30 02:25:10,268 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-11-30 02:25:10,617 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-11-30 02:25:11,213 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:25:11,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:25:11,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2020-11-30 02:25:11,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330507963] [2020-11-30 02:25:11,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-30 02:25:11,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:11,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-30 02:25:11,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2020-11-30 02:25:11,216 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 27 states. [2020-11-30 02:25:16,145 WARN L193 SmtUtils]: Spent 3.87 s on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-30 02:25:22,471 WARN L193 SmtUtils]: Spent 5.23 s on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-11-30 02:25:29,252 WARN L193 SmtUtils]: Spent 6.55 s on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-11-30 02:25:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:29,270 INFO L93 Difference]: Finished difference Result 175 states and 184 transitions. [2020-11-30 02:25:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-30 02:25:29,278 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 20 [2020-11-30 02:25:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:29,280 INFO L225 Difference]: With dead ends: 175 [2020-11-30 02:25:29,280 INFO L226 Difference]: Without dead ends: 175 [2020-11-30 02:25:29,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=561, Invalid=3729, Unknown=0, NotChecked=0, Total=4290 [2020-11-30 02:25:29,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-11-30 02:25:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 88. [2020-11-30 02:25:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-30 02:25:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2020-11-30 02:25:29,288 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 20 [2020-11-30 02:25:29,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:29,288 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2020-11-30 02:25:29,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-30 02:25:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2020-11-30 02:25:29,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 02:25:29,290 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:29,290 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:29,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-30 02:25:29,491 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-30 02:25:29,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:29,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1944937482, now seen corresponding path program 1 times [2020-11-30 02:25:29,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:29,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29814677] [2020-11-30 02:25:29,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:25:29,529 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:25:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:25:29,558 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:25:29,590 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 02:25:29,593 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 02:25:29,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-11-30 02:25:29,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:25:29 BoogieIcfgContainer [2020-11-30 02:25:29,655 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:25:29,655 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:25:29,655 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:25:29,656 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:25:29,656 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:24:58" (3/4) ... [2020-11-30 02:25:29,658 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 02:25:29,765 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_17594f80-3e6d-4528-b8db-b17c40262195/bin/utaipan/witness.graphml [2020-11-30 02:25:29,766 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:25:29,767 INFO L168 Benchmark]: Toolchain (without parser) took 32893.11 ms. Allocated memory was 90.2 MB in the beginning and 247.5 MB in the end (delta: 157.3 MB). Free memory was 60.2 MB in the beginning and 218.6 MB in the end (delta: -158.4 MB). Peak memory consumption was 140.9 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:29,767 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 90.2 MB. Free memory is still 67.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:25:29,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 688.61 ms. Allocated memory is still 90.2 MB. Free memory was 60.0 MB in the beginning and 58.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:29,771 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.66 ms. Allocated memory is still 90.2 MB. Free memory was 58.1 MB in the beginning and 56.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:29,771 INFO L168 Benchmark]: Boogie Preprocessor took 36.84 ms. Allocated memory is still 90.2 MB. Free memory was 56.2 MB in the beginning and 54.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:29,772 INFO L168 Benchmark]: RCFGBuilder took 873.09 ms. Allocated memory is still 90.2 MB. Free memory was 54.5 MB in the beginning and 45.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:29,772 INFO L168 Benchmark]: TraceAbstraction took 31087.98 ms. Allocated memory was 90.2 MB in the beginning and 247.5 MB in the end (delta: 157.3 MB). Free memory was 44.9 MB in the beginning and 81.1 MB in the end (delta: -36.2 MB). Peak memory consumption was 120.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:29,772 INFO L168 Benchmark]: Witness Printer took 110.59 ms. Allocated memory is still 247.5 MB. Free memory was 81.1 MB in the beginning and 218.6 MB in the end (delta: -137.5 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:29,776 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 90.2 MB. Free memory is still 67.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 688.61 ms. Allocated memory is still 90.2 MB. Free memory was 60.0 MB in the beginning and 58.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 87.66 ms. Allocated memory is still 90.2 MB. Free memory was 58.1 MB in the beginning and 56.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.84 ms. Allocated memory is still 90.2 MB. Free memory was 56.2 MB in the beginning and 54.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 873.09 ms. Allocated memory is still 90.2 MB. Free memory was 54.5 MB in the beginning and 45.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 31087.98 ms. Allocated memory was 90.2 MB in the beginning and 247.5 MB in the end (delta: 157.3 MB). Free memory was 44.9 MB in the beginning and 81.1 MB in the end (delta: -36.2 MB). Peak memory consumption was 120.4 MB. Max. memory is 16.1 GB. * Witness Printer took 110.59 ms. Allocated memory is still 247.5 MB. Free memory was 81.1 MB in the beginning and 218.6 MB in the end (delta: -137.5 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List p = a; [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 2 [L540] flag = 0 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] flag = 1 [L553] EXPR p->h [L553] COND TRUE p->h != 3 [L554] COND TRUE \read(flag) [L555] flag = 0 [L556] EXPR p->h [L556] COND TRUE p->h != 1 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "alternating_list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 68 locations, 30 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30.9s, OverallIterations: 15, TraceHistogramMax: 2, AutomataDifference: 20.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 658 SDtfs, 1538 SDslu, 1079 SDs, 0 SdLazy, 1527 SolverSat, 381 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 23.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 261 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 205 NumberOfCodeBlocks, 205 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 188 ConstructedInterpolants, 17 QuantifiedInterpolants, 28133 SizeOfPredicates, 11 NumberOfNonLiveVariables, 128 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 16 InterpolantComputations, 13 PerfectInterpolantSequences, 8/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...